Regex to filter int from url

Question

I'm trying to filter out a value of a url.

The url looks like the following:

http://userimages-akm.imvu.com/catalog/includes/modules/phpbb2/images/avatars/145870556_47076915459092eafd7b69.jpg

Now i'm trying to only receive the following part from the url: 145870556

I thought about using a regex. But i won't get a working regex beside this one:

^((http[s]?|ftp):\/)?\/?([^:\/\s]+)((\/\w+)*\/)([\w\-\.]+[^#?\s]+)(.*)?(#[\w\-]+)?$

Is there a better regex to use?

Or without regex: explode("_", end(explode("/", $url)))[0]; — bobble bubble
– bobble bubble, Commented May 7, 2017 at 22:43

fubar · Accepted Answer · 2017-05-07 22:14:01Z

1

If the image filename always follows the same format <timestamp>_<hex-value>.<extension>, then you don't need to match the entire URL.

$url = 'http://userimages-akm.imvu.com/catalog/includes/modules/phpbb2/images/avatars/145870556_47076915459092eafd7b69.jpg';
preg_match_all('~\/(\d+)_.*$~', $url, $matches);

// $matches[1] = '145870556';

https://regex101.com/r/vsDnoj/2

answered May 7, 2017 at 22:14

fubar

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3 Comments

zerkms Over a year ago

.*$ is redundant there.

fubar Over a year ago

For this example, perhaps. But I prefer to keep the regex as tight as possible to prevent possible mis-matches. Each to their own.

zerkms Over a year ago

.*$ does not make it any tight though. Just bloated (and slower) :-)

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